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Optical Burst SwitchingOptical Burst Switching

Outline

Introduction OPS OCS Optical Burst Switching Characteristics Purpose Advantages Disadvantages Conclusion

Introduction

OBS network is a optical communication network.

Data is transported in variable sized units called Bursts.

Dynamic nature leads to high network adaptability and scalability.

Promising solution for all optical network. Overcomes the complexity of OPS &

OCS.

OCS (Optical circuit switching) Light paths are set up between source

and destination nodes No statistical multiplexing Inefficient bandwidth utilization when

carrying bursty traffic

OPS (Optical packet switching)

High bandwidth utilization due to statistical multiplexing

Need to buffer packets at intermediate nodes

Not feasible in the near future

OPTICAL BURST SWITCHING

Optical network technology.

Implemented using WDM .

Used in core network and viewed as a feasible compromising b/w OPS & OCS

OBS Concept

Characteristics

Resources are allocated by using one-pass reservation.

Burst switching does not require buffering inside the core network.

Hybrid approach. Variable length bursts.

OBS Building Blocks

Burst assembly: assembly of client layer data into bursts

Burst reservation protocols: end-to-end burst transmission scheme

Burst scheduling: assignment of resources at individual nodes

Purpose

To dynamically provision sub-wavelength granularity by optically combining electronics and optics.

Used for realizing dynamic end-to-end all optical communication.

One of the benefit of burst aggregation is it shapes .

Advantages

More efficient band width utilization Remove throughput limitation. Reducing processing requirements. Core network energy consumption

Disadvantages

In efficient utilization of resources Dependence on speed Faces two technological bottlenecks Noise accumulation

Conclusion

Optical communication network. Efficient way to resolve the problem of

congestion that internet suffering from.

Thank you…